But Dave couldn't help bring up Gomez's world-famous ex, and Gomez couldn't help burning her former flame.

After Letterman casually mentioned to Gomez that the last time she was on his show she was still dating "a Justin Bieber," Selena shuddered for a moment at the thought of there being more than one Justin Bieber, before confirming that the two had in fact split up.

Dave went on to mention that the last time Bieber was on his show, the late-night talk show host said something that made Bieber cry.

To which Gomez replied: "Well, then that makes two of us."

Ouch.

Gomez is no stranger to death threats, but the Belieber Army is becoming more unhinged every day, so be careful out there Selena.